Answerability-Aware Open-Domain Question Answering

3. The system of claim 2, the memory storing instructions executable by the processor to determine each of the set of adjusted unanswerability scores as a weighted average of the normalized unanswerability score for the respective non-answering context and the relevance score for the respective non-answering context.

4. The system of claim 1, the memory storing instructions executable by the processor to identify a smallest adjusted unanswerability score among the set of adjusted unanswerability scores as the open-domain unanswerability score for the question.

5. The system of claim 1, the memory storing instructions executable by the processor to determine the open-domain result for the question based on a comparison of the open-domain unanswerability score with a threshold value.

8. The system of claim 1, the memory storing instructions executable by the processor to select the plurality of candidate contexts from among the plurality of contexts of the open-domain context search space based on respective relevance scores for the plurality of candidate contexts.

9. The system of claim 1, the memory storing instructions executable by the processor to output the result information to a human-machine interface (HMI).

12. The method of claim 11, comprising determining each of the set of adjusted unanswerability scores as a weighted average of the normalized unanswerability score for the respective non-answering context and the relevance score for the respective non-answering context.

13. The method of claim 10, comprising identifying a smallest adjusted unanswerability score among the set of adjusted unanswerability scores as the open-domain unanswerability score for the question.

14. The method of claim 10, comprising determining the open-domain result for the question based on a comparison of the open-domain unanswerability score with a threshold value.

17. The method of claim 10, comprising selecting the plurality of candidate contexts from among the plurality of contexts of the open-domain context search space based on respective relevance scores for the plurality of candidate contexts.

18. The method of claim 10, comprising outputting the result information to a human-machine interface (HMI).

22. The system of claim 20, the memory storing instructions executable by the processor to identify a smallest adjusted unanswerability score among the set of adjusted unanswerability scores as the open-domain unanswerability score for the question.

23. The system of claim 19, the memory storing instructions executable by the processor to determine the open-domain result for the question based on a comparison of the open-domain unanswerability score with a threshold value.

24. The system of claim 19, the memory storing instructions executable by the processor to determine the open-domain result for the question based on a comparison of the open-domain unanswerability score with a threshold value.

25. The system of claim 19, the memory storing instructions executable by the processor to output the result information to a human-machine interface (HMI).